Rock-drill.



N0. 690,042. Patented Dec. 3|, I901. G. I]. WARREN.

ROCK DRILL.

Application filed May 1, 1901.] (No llbdl.) 2 Sheats-Sheet l.

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a; n. WARREN. ROCK DRILL.

Application filedMay 1. 1901-) (No Model.) 2 Sheets-Sheet 2.

Unrrno STATES PATENT OFFICE.

GOVERNOR D. IVARREN, OF INDEPENDENCE, COLORADO.

ROCK-DRILL.

SPEGIFIGATION forming part of Letters Patent No. 690,042, dated December 3 Application filed May 1,1901. Serial No. 5 8,382.

To aZZ whom it may concern.-

Be it known that I, GOVERNOR D. WAR- BEN, a citizen of the United States, residing at Independence, in the county of Teller and State of Colorado, have invented newand useful Improvements in Rock-Drills, of which the following is a specification.

My invention relates to improvements in rock-drills, and pertains particularly to that class in which steam or air is used as the motive power.

The object of my invention is to provide a rock-drill in which the piston is partially rotated during the backward movement thereof, so that the drill will strike in a different position on each forward movement of the piston, so that a round opening will be drilled.

Another object of my invention is to provide a cheap, simple, and durable rock-drill which will fully accomplish the above result using any desired per cent. of expansion.

In the accompanying drawings, Figure 1 is a top plan View of my machine. Fig. 2 is a vertical longitudinal sectional view. Fig. 3 is a horizontal longitudinal sectional view. Fig. 4 is a transverse sectional view. Fig. 5 is a side and end view of my valve-shifting plate. Fig. 6 is a detached sectional view of one of the pawls.

Referring now to the drawings, M represents the ordinary cylinder of a rock-drill, suitably mounted upon a base and longitudinally adjustable thereon for the purpose of moving the drill forward as it Works its Way into the rock, as is well known to those skilled in the art. The said cylinder has a centrallylocated enlarged square portion M, which has its upper end open, as clearly shown in the drawings. \Vithin the lower portion of said enlarged portion of the cylinder is a semicircular elongated plate or shield J, having at each end upwardly-extending ledges j, between which the sleeve 2' rests and is prevented from sliding within the cylinder. l'Vithin the enlarged central portion of the cylinder is avalve-block A, which has a round transverse opening A,forming the valveseat, and having one end closed and within which is located the valve f, which is practically T- shaped, as clearly shown. valve is enlarged to snugly fit said opening and has an annular recess adapted to receive One end of said (No model.)

a packing n for the purpose of making the device air-tight. The said enlarged portion has secured thereto a downwardly-projecting arm 6, which passes through an opening K in the valve-seat and enters the cylinder for the purpose hereinafter more fully described. Above the said valve-opening A and communicating therewith its entire length is an exhaust Z, which communicates with the pipe Z, whereby the exhaust is conveyed to any desired point. Extending transverse the said opening valve-seat nearer the lower edge of the valve-opening A is a steam-inlet port B, which communicates with the opening A its entire length as clearly shown in dotted lines, Fig. 1. Communicating with the said valve-opening A, on either side between the exhaust Z and the inlet-port B, are supply-pipes Y, extending longitudinally thereof and communicating with the supply-pipes Y in the upper portion of the cylinder,whereby the steam is conveyed to both ends of the cylinder. The said valve-block has at either end outwardly-extending portions H, which rest upon the cylinder and whereby it is supported and through which the supply-ports Y pass. The lower face of the valve-lolock A is concaved to correspond with the curve of the cylinder and has extending longitudinally thereof two radiallyextending square recesses h, which have resting therein the spring-pressed pawls h,which have their outer ends leveled, as shown at c, for the purpose afterward to be fully described. The inner faces of the pawl have openings at either end, said opening having a reduced inner end. Within the said large portion of said opening is a coil-spring and a pin or key 99, having a reduced inner end passing through the coilspring and entering the reduced opening and large portion resting upon the spring,whereby when the key engages the inner face of the recess 71 the tendency of the springs is to force the pawl h outwardly in engagement with the ratchet 1'.

Within the cylinder M is a piston D, which is connected to the pistonrod O, which extends out through the piston-head and which has secured to the end thereof in any desired manner a drillof the character used in such machines. The said piston consists of enlarged portions (Z at either end and a reduced central portion b. The portion at is of a size to snugly fit within the cylinder and has in its outer periphery annular recesses cl to receive a packing d of any desired material. The outer enlarged portion is formed separately from the other and is made in two parts and held together by the bolt or pin 0, so that it can be readily attached or detached for the purpose of insertingthe sleeveion the reduced portion 19. The reduced central portion 1) of the piston has spirally-arranged grooves b, and loosely mounted upon said reduced portion is a sleeve t', which has on its inner faces spirally arranged projections j, which fit Within the spirally-arranged grooves in the reduced portion b of the piston. The said sleeve t' has on the outside at either end a solid portion q, and between said solid portions are ratchet-grooves z" of a length equal to that of the pawls h, whereby the pawls rest within the ratchet teeth and prevent the sleeve from being rotated in but one direction. Extending across the reduced portion 19 of said piston on one side is a semicircular valveshifting plate k, which extends out beyond the edge of the portion 02 and rests within a longitudinal groove 3 in the side of the cylinder M, whereby the said valve-shifting plate is allowed to slide with the piston, but prevented from turning with the piston. The said plate has a cut-away portion therein between its ends and in which the down wardlyextending arm 6 of the valve rests for the purpose of oscillating the valve.

The operation of my device is as follows: Steam is first admitted in the rear end of the cyli-nderandforces the piston forward, and as the spiral grooves carried thereby receive the projection carried by the sleeve it rotates the said sleeve, as the ratchets are so arranged that the pawls slip loosely over them andthe piston has astraight forward stroke.

. The valve-arm coming in engagement with one of the end walls of the cut-away'portion ofthe plate 7c will oscillate the valve and al- .low the steam to enter the opposite end of the cylinder, and as the sleeve is held against rotation by the arrangement of the pawls and ratehets the piston will therefore make a partial revolution on the backward movement, whereby the drill will not strike in the same place on each forward stroke.

Having thus described myinvention, what I claim, and desire to secure by Letters Paten-t, is

1. A rock-drill comprising a cylinder, a piston therein, a sleeve surrounding said piston and having ratchet-teeth and adapted to revolve the piston, pawls carried by the cylinder and adapted to allow the sleeve to rotate in one direction and means for preventing the sleeve from moving longitudinally Within the cylinder, substantially as described.

2. A rock-drill comprising a cylinder, a piston therein having a reduced central portion having spirally-arranged grooves, a sleeve on said reduced portion, spirally-arranged projections carried by said sleeve and entering said grooves, ratchet-teeth carried by said sleeve and pawls carried by the cylinder and adapted to allow the sleeve to rotate in one direction, substantially as described.

3. A rock-drill comprising a cylinder, a piston therein, a sleeve carried by the piston and adapted to rotate the same, said sleeve having a reduced central portion, ratchet-teeth carried by said portion, pawls adapted to allow the sleeve to rotate in one direction and means for preventing the sleeve from moving longitudinally within the cylinder, substantially as described.

4. A rock-drill comprising a cylinder, a piston therein having a reduced central portion having spirallyarranged g'rooves,a sleeve on said reduced portion, spirally-arranged projections carried by the said sleeve and resting in said grooves, said sleeve having a reduced central portion, ratchet-teeth carried by said reduced portion, pawls carried by the cylinder and adapted to allow the sleeve to rotate in one directionand means for preventing the sleeve from sliding within the cylinder, substantially as described.

5. A rock-drill comprising a cylinder, a piston therein, a sleeve carried by the piston, said sleeve having a reduced central portion, ratchet-teeth carried by said reduced portion, pawls carried by the cylinder of a Width equal to the length of the said reduced ratchet por tion of the sleeve, and means for preventing the sleeve from sliding within the cylinder,

substantially as described.

6. A rock-drill comprising a cylinder, a

valve thereabove, an arm carried by the valve,

and entering the cylinder,and a shifting-plate carried by one side of the piston and adapted to engage said arm, and means for preventing it from rotating therewith, substantially as described.

7. A rockdrill comprising a cylinder, a valve in communication with said cylinder, an operating-arm carried by the valve and entering the cylinder, a shifting-plate carried by the piston and adapted to engage said arm, and a projection carried by the said plate and adapted to enter a groove carried by the inner face of the cylinder, whereby the plate is prevented from rotating with the piston, sub stantially as described.

8. A rock -drill comprising a cylinder, a valve in communication with said cylinder, an operating-arm carried by the valve and adapted to enter the cylinder at one side, a piston within said cylinder, a shifting-plate carried by one side of said piston and projecting beyond its periphery, and havinga reduced central portion adapted to receive the valve-0pcrating arm, and the said cylinder having a longitudinal groove in the side adjacent the shifting-plate and adapted to receive the portion projecting beyond the piston, whereby the shifting-plate is prevented from rotating with the piston, substantially as described.

9. A rock-drill comprising a cylinder having a centrally-arranged vertical opening, a piston therein carrying a sleeve provided with ratchet-teeth, a valve-block within said opening and carrying a valve and having its lower face rounded to correspond with the curvature of the cylinder and radially-extending openings in said lower face, and outwardly spring-pressed pawls within the said opening and engaging said teeth, substantially as described.

10. A rock-drill comprising a cylinder, a piston therein, a sleeve carried by the piston, ratchet-teeth carried by said sleeve, pawls engaging said teeth, a shifting-plate carried by the cylinder, and means carried by the shifting-plate for holding the sleeve against longitudinal movement, substantially as described.

11. A rock-drill comprising a cylinder, a piston therein, having a reduced central portion, a sleeve on said reduced portion having ratchet-teeth, pawls engaging said teeth, a plate secured within the cylinder, and upwardly-extending projections adapted to engage both ends of said sleeve, whereby it is prevented from moving longitudinally, substantially as described.

12. A rock-drill comprising a cylinder, a piston therein having a reduced central portion, a sleeve on said reduced portion, ratchetteeth carried by said sleeve, pawls engaging said teeth, a plate carried by the lower inner face of the cylinder, and upwardly-extending flanges carried by said plate between which the sleeve rotates, substantially as described.

13. A rock-drill comprising a cylinder, a centrally located shield rigidly mounted therein, an upwardly-extending arm at each end thereof, a sleeve rotatably mounted between said arms and having ratchet-teeth on its outer periphery, pawls adapted to engage said teeth, and a piston having a reduced portion passing through said sleeve, and adapted to rotate it on its rearward stroke, substan tially as described.

14. A rock-drill comprising a cylinder, a sleeve rotatably mounted therein, ratchetteeth carried by said sleeve, pawls adapted to engage said teeth, a piston having a re duced portion passing through said sleeve, means carried by the sleeve for rotating the piston in one direction, a valve above said sleeve, an arm operating the valve and entering the cylinder, a shifting-plate carried by the reduced portion of the piston and engaging said arm and means for preventing said strip from rotating with the piston, substantially as described.

15. In a rock-drill, the combination with a piston, of a sleeve centrally located on said piston, ratchet-teeth carried by the outer periphery of said sleeve, and means carried by the sleeve for rotating the piston, substantially as described.

16. In a rock-drill, the combination with a cylinder, of a piston therein, a sleeve centrally located on said piston, ratchet-teeth carried by the outer periphery of said sleeve, pawls carried by the cylinder and engaging said ratchet-teeth and means carried by the sleeve for rotating the piston, substantially as described.

17. In a rock-drill, the combination with a cylinder, of a piston therein, a sleeve centrally located on said piston, ratchet-teeth carried by the outer periphery of said sleeve, means carried by the sleeve for rotating the piston and inlet-ports at both ends of the cylinder, substantially as described.

18. In a rock-drill, the combination with a cylinder of a piston therein having a reduced central portion provided with radially-extending grooves, a sleeve carried by the cylinder and surrounding the reduced portion of the piston, radially-extending projections carried by said sleeve and adapted to enter the radially-extending grooves in the piston, ratchet-teeth carried by the outer periphery of said sleeve, and pawls carried by the cylinder and adapted to engage said teeth, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

GOVERNOR D. WARREN.

Witnesses:

AL. NESSELROOD, '1. A. INSLEY. 

